﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace ChevonChristieCode.Media
{
   public class ClipBound
   {
      public static bool GetToBounds(DependencyObject depObj)
      {
         return (bool)depObj.GetValue(ToBoundsProperty);
      }

      public static void SetToBounds(DependencyObject depObj, bool clipToBounds)
      {
         depObj.SetValue(ToBoundsProperty, clipToBounds);
      }

      /// <summary>
      /// Identifies the ToBounds Dependency Property.
      /// <summary>
      public static readonly DependencyProperty ToBoundsProperty =
          DependencyProperty.RegisterAttached("ToBounds", typeof(bool),
          typeof(ClipBound), new PropertyMetadata(false, OnToBoundsPropertyChanged));

      private static void OnToBoundsPropertyChanged(DependencyObject d,
          DependencyPropertyChangedEventArgs e)
      {
         FrameworkElement fe = d as FrameworkElement;
         if (fe != null)
         {
            ClipToBounds(fe);

            // whenever the element which this property is attached to is loaded
            // or re-sizes, we need to update its clipping geometry
            fe.Loaded += new RoutedEventHandler(fe_Loaded);
            fe.SizeChanged += new SizeChangedEventHandler(fe_SizeChanged);
         }
      }

      /// <summary>
      /// Creates a rectangular clipping geometry which matches the geometry of the
      /// passed element
      /// </summary>
      private static void ClipToBounds(FrameworkElement fe)
      {
         if (GetToBounds(fe))
         {
            fe.Clip = new RectangleGeometry()
            {
               Rect = new Rect(0, 0, fe.ActualWidth, fe.ActualHeight)
            };
         }
         else
         {
            fe.Clip = null;
         }
      }

      static void fe_SizeChanged(object sender, SizeChangedEventArgs e)
      {
         ClipToBounds(sender as FrameworkElement);
      }

      static void fe_Loaded(object sender, RoutedEventArgs e)
      {
         ClipToBounds(sender as FrameworkElement);
      }
   }
}